NAD-T162-avr-sm维修电路原理图.pdf
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1、NAD SERVICE MANUALT 762 T 762 AV SURROUND SOUND RECEIVER AV SURROUND SOUND RECEIVER DRAFT DATE: July 08RadioFans.CN 收音机爱 好者资料库 2 SAFETY INFORMATION RadioFans.CN 收音机爱 好者资料库 3 SERVICE SAFETY PRECAUTIONS 1. Replacing the fuses CAUTION: FOR CONTINUED PROTECTION AGAINST THE RISK OF FIRE REPLACE ONLY WITH
2、 SAME TYPE OF FUSE. Reference DesignatorPart NumberDescription F751*AH33-0191001-00-88Fuse 10A 250V Time Lag 5x20 MM UL/CSA F751*C33-0181006-00-88Fuse 6.3A 250V Time Lag 5x20 MM UL/CSA/SEMKO/VDE F752*AH33-0111006-00-48Fuse 1.6A 250V Time Lag 5x20 MM UL/CSA/VDE/SEMKO F752*C33-0151006-00-48Fuse 800mA
3、250V Time Lag 5x20 MM UL/CSA/VDE/SEMKO NOTE: : USA, CANADIAN MODEL ONLY. : EUROPEAN MODEL ONLY. 2. Safety check out (Only U.S.A. model) Before returning the product to the customer, make leakage current or resistance measurements to determine that exposed parts are acceptably insulated from supply c
4、ircuit. CONTENTS DESCRIPTIONPAGE SPECIFICATIONS . 4 - 5 REAR PANEL / FRONT PANEL VIEW . 6 DISASSEMBLY INSTRUCTIONS . 7 WIRING DIAGRAM . 8 BLOCK DIAGRAM . 9 ADJUSTMENT POINTS DIAGRAM / AMPLIFIER ADJUSTMENT . 10 PCB LAYOUT .11 - 22 SCHEMATIC DIAGRAM . 23 - 38 IC BLOCK DIAGRAM . 39 - 47 EXPLODED VIEW.
5、48 EXPLODED VIEW PARTS LIST. 49 - 50 ELECTRICAL PARTS LIST . 51 - 65 PACKING DIAGRAM . 66 VERSION HISTORY . 67 VERSION T762i PARTS LIST. 68 Parts marked with the symbol are critical with regard to the risk of fire and electric shock. Replace only with parts recommended by the manufacturer. RadioFans
6、.CN 收音机爱 好者资料库 4 SPECIFICATIONS POWER AMPLIFIER SECTION Rated distortion(Rated power level into 8 ohms, THD 20 Hz-20 kHz FL/C/FR) 0.1 % (Rated power level into 8 ohms, THD 20 Hz-20 kHz SL/SR/BS) 0.1 % Input Sensitivity(ref. 8 ohms, 1 kHz)220 20 mV S/N Ratio(A-wtd, 1kHz, 1 W, 8 ohm, SL/SR/BL) - 72 dB
7、 Frequency Response(20 Hz - 20 kHz)0 1.0 dB Channel Balance(1 dB to -40 dB, 1 kHz) 2 dB (-41 dB to -50 dB, 1 kHz) 3 dB Audio muting at 1 kHz 55 dB Subwoofer out, 500 mV in (THD at 2 V O/P, 100 Hz) 0.5 % Crosstalk(500 mV input, 10 W, 1 kHz) -57 dB Controls Bass(at 500 mV in, 1 W out, 100 Hz) 10 dB 2
8、dB Treble(at 500 mV in, 1 W out, 10 kHz) 10 dB 2 dB DOLBY DIGITAL SECTION Channel Difference(FL ref. Track 30) 1.2 dB Frequency Resporse at Dolby config.2SL Track 46 200 - 20 kHz 0.8 dB SR Track 47 200 - 20 kHz 0.8 dB C Track 44 200 - 20 kHz 0.8 dB Harmonic Distortion(1 W, Audio LPF, Dolby Congfig 1
9、)FL Track 65 997 Hz 0.08 % FR Track 67 997 Hz 0.08 % SL Track 68 997 Hz 0.08 % SR Track 69 997 Hz 0.08 % C Track 66 997 Hz 0.08 % S/N Ratio(31 for O/P 1 W, Track 35)CCIR / ARM 65 dB Audio LPF 70 dB A-wtd 70 dB Channel Separation(1 W, 20 kHz LPF)Track 65 997 Hz 60 dB DOLBY PRO LOGIC II SECTION Freque
10、ncy Resporse I/P mode : L, R: 1 V in, 1 W, Ch L/R40 Hz0 2.0 dB 20 Hz0 2.0 dB I/P mode : L=R: 1 V in, 1 W, Ch /L/R40 Hz0 2.0 dB Ch C20 kHz0 2.0 dB I/P mode : L=-R: 1 V in, 1 W, Ch SL/SR40 Hz0 2.0 dB 20 kHz0 2.0 dB S/N Ratio (200 mV in, 1 W, A-WTD w/ 1 k termination) I/P mode : L, R: 1 kHz, Ch L/R 65
11、dB I/P mode : L=R: 1 kHz, Ch C 65 dB I/P mode : L=-R: 1 kHz, Ch SL/SR 65 dB THD (2.2 V in, 1 W, w/ 80 kHz LPF, 1 kHz) 0.2 % RadioFans.CN 收音机爱 好者资料库 5 DTS SECTION Output Level (Vol 0 dB): FL/FR/C/SL/SRTrack 61 kHz0.5 2.0 W Channel Difference (FL ref): FL/FR/C/SL/SRTrack 61 kHz 1.0 dB Harmonic Distort
12、ion (Audio Filter) : FL/FR/C/SL/SRTrack 10-14 1 kHz 0.08 % Frequency Response (20 Hz to 20 kHz)Track 26-30+2/-1.5 Subwoofer Output Level1 kHz ref at pre-out (FL)Play Track 10, charge to 1510.5 1.5 dB AM TUNER SECTION Input level is expressed as the reading in open circuit of 75-ohm source impedance
13、signal generator Usable sensitivity(999/1000 kHz) 30 dBuV S/N Ratio(5 mV in) 38 dB THD(5 mV in) 3 % IF Rejection(450 kHz) 36 dB Image Rejection(F+2xIF) 28 dB Selectivity 17 dB Output170 20 mV Loop sensitivity(20 dB S/N) 999/1000 kHz 66 dB 603/600 kHz 66 dB 1404/1400 kHz 66 dB Frequency Response(100
14、- 2.3 kHz, 5 mV) 6 dB FM TUNER SECTION*C*AH Input level is expressed as the reading in open circuit of 75-ohm source impedance signal generator Usable sensitivity(98 MHz) 15 dBV 15 dBuv S/N Ratio(60 dB, IHF wtd)Mono 63 dB 63 dB Stereo 63 dB 63 dB Frequency Response(20 Hz - 15 kHz, 60 dB)0 1.5 dB0 1.
15、5 dB Channel Separation(60 dB)100 Hz 30 dB 30 dB 1 k 38 dB 38 dB 10 kHz 30 dB 30 dB Alternate Channel Selectivity (40 dB, 400 kHz) 60 dB 45 dB Capture Ratio(40 dB) 3 dB 3 dB AM Suppression (60 dB, 100% Mod. FM, 30% Mod. AM) 48 dB 48 dB Image Rejection(119.4 MHz) 65 dB I.F. Rejection(10.7 MHz) 78 dB
16、Pilot Suppression(98 MHz) 60 dB 60 dB THD (60 dB, L=R 75 kHz for AH, 40 kHz Dev for C)Mono 0.25 % 0.25 % Stereo 0.35 % 0.35 % Auto-Search SensitivityOn 24 dB 24 dB Off 15 dB 15 dB RDS decode Sensitivity 26 dB PHYSICAL SPECIFICATIONS Dimensions (Width x Height x Depth)435 x 167 x 382 mm Net Weight18.
17、50 Kg (40.70 lbs) Shipping Weight22.20 Kg (48.84 lbs) RadioFans.CN 收音机爱 好者资料库 6 123456789 2120111912131415161718 10 FRONT PANEL REAR PANEL / FRONT PANEL VIEW REAR PANEL 1.FM & AM ANTENNA 2.MAIN IN / AUDIO PRE-OUTS / SUBWOOFER OUT 3.SOFT CLIPPING ON/OFF 4.MONITOR OUT 5.MS OUT (MULTISOURCE OUT) 6.CD I
18、NPUT 7.IR INPUT & OUTPUT 8.12V TRIGGER INPUT & OUTPUT 9.COMPONENT VIDEO IN & COMPONENT VIDEO OUT 10.DIGITAL AUDIO INPUT & DIGITAL AUDIO OUTPUT 11.RS-232 12.SWITCHED AC OUTLETS 13.AC POWER INLET 14.SPEAKERS A & B 15.DVD, SAT, VCR, VIDEO 4 & VIDEO 5 16.TAPE INPUT & OUTPUT 17.DISC INPUT 18.7.1 CH. INPU
19、TS 1.POWER 2.STAND-BY 3.AM / FM 4.FM MUTE / MODE 5.DISPLAY 6.MEMORY 7.PRESET DOWN / UP 8.SEARCH DOWN / UP 9.VFL DISPLAY 10.VOLUME (SETUP) 11.VIDEO & AUDIO 12.TAPE MONITOR 13.DIGITAL AUDIO SELECTOR 14.EXT. 7.1 15.SURROUND MODE 16.LEVELS 17.TONE CONTROLS 18.TONE DEFEAT 19.SPEAKERS A & B 20.VIDEO 6 INP
20、UT 21.PHONES RadioFans.CN 收音机爱 好者资料库 7 DISASSEMBLY INSTRUCTIONS 1.Remove machine screws M4.0 x 8.0 (1 to 6) from the side panels. Remove tapping screw 3.0 x 8.0 (7 to 10) from the back panel. Refer to Figure No. 1. 1 4 5 6 7 8 9 10 2 3 2.Pull both sides of the TOP COVER slightly outwards 11 and tilt
21、 approx. 35 and then remove in the direction as indicated by the arrow 12. Refer to Figure No. 2. Figure No. 1 12 11 11 Figure No. 2 RadioFans.CN 收音机爱 好者资料库 8 THERM SENSNORUL VERSION : USE J758, J759 CE VERSION : USE J760 MOUNT ON CHASSIS GND 82-0326135-07-98 CABLE ASSY 3 WAYS #26 UL2877 L=150 36-28
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